The problem with Old Right isolationism and crackpot history

I don't know exactly how David Swanson of AfterDowningStreeet.org sees his own political perspective. But in this video, he elaborates what is the Old Right isolationist, rightwing revisionist, dishonest view on the Second World War.

Like (other?) Old Right revisionists, Swanson may be making some good points. But the War of 1812 was a defensive war by Britain against the US? Please. The kind of distorted, even crackpot points he presents make it hard to give credence to pretty much of anything he's claiming.